Bearing-guide for grinding-machines.



W. S. THOMSON.

BEARING GUIDE FOR GRINDING MACHINES.

APPLICATION FILED APR. 26.19 17.

Patented Feb. 26, 1918.

2 SHEETS-SHEET I.

W. S. THOMSON. BEARING GUIDE FOR GRINDING MACHINES.

APPLICATIQN FILED APR- 25. [917.

Patented Feb. 26, 1918.

2 SHEETS-SHEET 2- awn nine.

WILLIAM S. THOMSON, 0F PLANTSVILLE, CONNECTICUT, ASSIGNOB. TO THE E. D.SMITH & COMPANY, OF PLANTSVILLE, CONNECTICUT, A CORPORATION.

BEARING-GUIDE FOR GRINDING-MACHINES.

mamas;

Specification of Letters Patent.

Patented Felo. 28, T91.

Application filed April 26, 1917. Serial No. 164,603.

To all whom it may concern:

THOMSON, a citizen of the United States, res

siding at Plantsville. in the county of. Hartford and State ofConnecticut, have invented certain new and useful Improvements inBearing-Guides for GrrindinglVIachines of which the following is aspecification.

My invention relates to improvements in bearing guides for grindingmachines, a nd the object of my improvement is simplicity and economy inconstruction and convenience and efficiency in use.

In the accompanying drawing Figure 1 is a front elevation of a grindingmachine embodying my invention.

Fig. 2 is a side elevation of the upper part of the same.

Fig. 3 is a sectional viewon the line 00 wof Fig. 2. v I

Fig. 4 is a sectional view on the line a z of Fig. 3. p

Fig.5 is a sectional view on the line u u of Fig. 3. e V r v Fig. 6 is afragmentary View, on an enlarged scale, of certain parts Shown in Fig.5.

The grinding machine shown as embodying my invention corresponds to theone shown and described in the patent mentioned, and comprises a casing10 in which is coperatively housed a shaft 11 wh1ch projects outwardlytherefrom a-nd'on the outer end of-which is mounted a grinding orpolishing wheel 12, and the operation of which is controlled by a handle13.

The casing 10 is a shell-like structure and comprises a body portioncomposed of a pedestal portion l i'having tapered front and rear wallsand merging into the base 15 at the lower end and at the upper endmerging into the box-like head 16, the upper end being closed by a cover17.

The shaft 11 is mounted in ball bearings 19 provided in a pair ofjournalheads 20 positioned in the caslng head 16. The drlven pulley 21 isshrunk on the shaft 11 between the journal heads 20 and the belt 22rests on the upper face thereof, and drops downwardly to the drivingpulley on a counter shaft directly below the same. The shaft 11 projectsthrough a vertical slot 23 in the end wall of the casing head 16 and isprovided with means for being raised and lowered, a brief description ofwhich will suffice for the present application.

Below the pulley 21 is a plate-like bridge 26 that serves as a brake forthe pulley when dropped thereon.

The shaft 11 as stated is operatively supported by bearings 19 providedin the journal heads 20. The journal heads 20 comprise-a head proper 28provided with an axial bore 29 in which is positioned the shaft 11 andhaving vertical ways 30 at the front and rear, suitable for slidablyengaging with guideways 31 secured to the casing head 16 by screws 32and 33, and a neck 3-1 extending downwardly from the said head proper28. The neck 34 is provided with a screw threaded hole 35 extendingupwardly from handed, and the lower end thereof engages with theinternally threaded boss 37 on the yoke 38. Below the boss 37 the yoke38 is provided with a slot 89 which extends transversely relatively tothe vertical axial plane of the shaft 11 and supporting stud 36 andwhich is a fit for and in which is positioned the auxiliary shaft or rod40. The two yokes 38 are in horizontal alinement and the aux liiaryshaft 40 extends therethrough and the ends thereof are securedeccentrically to the disks 4L1 rotatively housed in the bosses 42 in theside walls of the casing 10.

As the disks or eccentrics 41 are rotated the auxiliary shaft 40 ismoved in an are and the same is accordingly raised and lowa cried aswellas swung back and forth relatively to the vertical axial plane. Theslot 39 permits of the cross-wise movement of the auxiliary shaft l0while the yoke 38, stud 36, and journal head 20 are maintained constantly in the same axial and vertical plane,

of uniform cross-section and suitable length positioned in the casinghead 16 and adjacent and parallel with the front and backwalls 61thereof. These have a V shaped formation 011 the inner face 62 thereofand arev fiat along the outer face63, .and have a screw threaded hole 64at about the middle of-the' outer face 63 suitable for receivingthesupporting screw 32. These screws 32 pass through holes 67 in the outerwall 61 and the heads 65 engage with the outer faces of the said outerwall 61, preferably in a counter bored seat 66 provided therefor.

The screws 33 are headless and are engaged with the screw threaded holes68 in the walls 61 and engage with their inner ends against the outerface 63 of the track or way 31, and serve as backing screws inopposition to the middle supporting screws 32, there being two backingscrews33, one above and onebelow the'supportmg screw 32 in each case.-

As described, the tracks orways 31 are substantially parallel with thewalls 61 and they are in spaced relation thereto, being spacedtherefrom'by a small space 69 suf ficient with the limited freedom ofmovement' permitted by the screw supporting m'eans'provided to permit ofa slight adjustment ofthe said tracks to provide for properly guidingthe journal heads 20 in their movement substantially in a verticalplane;

The neck 34: onthe journal heads 20 is elongated, and'the threaded upperend 70 of the stud 36 engaged therewith is correspondingly elongated,and the ways 30 on the body portion or head proper are also elongatedand theseparts cooperate to maintain the yoke 28' on the same verticalplane, the body portion or head proper 28, stud 36 and yoke 38 beingpositively positioned as a unit. -As the box-like head 16 of the casinghas vertical and parallel front and back walls 61 the guide ways orguide rails 31 are parallel to the said walls, and by making the casinghead 16 slightly large I am enabled to provide the clearance space 69alread mentioned between the said walls 61 and the rails 31. Byproviding the clearance 69,

V f and thus avoiding actual contact of the rails 31 with the opposedwalls 61, the tracks 31 areproperly supported in operative positionwithout the necessity of finishing the I opposed'wall 61, which is leftrough, just as cast, the casing structure being made of cast iron.

As described the screws that support the tracks 31 comprise the tensionscrew 32 at the middle and a thrust screw 33 on each side thereof.

This is the preferred arrangement, although in some cases thearrangement of the screws may be reversed, by having two tension screwson the sides and a single thrust screw at the middle.

I claim as my invention 1. In combination in a grinding machine, acasing having a box-like head portion at theupper end, journal headshoused in the said head portion and having each a pair of ways, one onthe front and one on the :back wall, and a guide track for the saidjournal heads engaged with the said ways, and supported from the wallsof the said head portion, and means for adj ustably supporting the saidtracks from the said walls comprising cooperating tension andcompression screw mechanism.

2. In combination in a grinding machine, a casing having a box-like headportion at the upper end, journal heads housed in the said head portionand having each a pair of ways, one on the front and one on the backwall, and a guide track for the said journal heads engaged with the saidways, supported from the walls of the said head portion, and means foradjustably supporting the said tracks from the said walls comprisingcooperating tension and compression screw mechanism, and the said meansfor supporting the said tracks from the said walls comprising in eachcase a set of screws extending through holes in the said well andcomposed of a tension screw at the middle and a pair of compressionscrews, one on each side of the said tension screw, the said tensionscrew having a head at one end engaged with the said wall and having'theother end threaded into. the said track, and the said compression screwshaving threaded engagement with the holes in the said wall and havingthrust engagement by the inner nds with the opposed face of the saidtrack.

3. In a grinding machine, a, casing having an unfinished inside wall,journal boxes housed therein, means for raising and lowering the saidjournal boxes, guide ways en gaged with the said journal boxes, andmeans for supporting the said guide ways from the said inside wall, andthe said last named means being operative to support the said guide waysin spaced relation to the said inside wall.

4. In a grinding machine comprisin a casing, journal boxes housedtherein having means for being raised and lowered, guide ways engagedwith the said journal boxes, and the said guide ways being supported byscrews that penetrate the walls of the said casing, and which engage bytheir ends with the said guide ways.

mamas 5. In a grinding machine comprising a casing, journal boxes housedtherein having means for being raised and lowered, gulde ways engagedwith the said journal boxes, and a plurality of screws penetrating thewalls of the said casing, engaged with the said guide ways, andoperative to hold the said guide ways in spaced relation to the saidwalls of the casing.

6. A grinding machine comprising a casing, a shaft provided with apulley and a grinding wheel, bearings inithe said casing and engagedwith the said shaft, means for raising and lowering the said bearings,means for guiding the said bearings in a Vertical plane comprising aplurality of tracks engaged with thesaid bearings and the said trackssupported from the said casing by means of a set of screws comprising amiddle screw and a pair of screws one on each side of the said middlescrew, and the said screws being engaged with the said track so that thesaid middle screw is in op osition to the said pair of screws.

A grinding machine comprising a casing, a shaft, hearings in the saidcasing and engaged with the said shaft, means for raising and loweringthe said bearings, and

means for guiding each of the said bearings comprising a track engagedtherewith, and means for supporting the said track comprising a middlescrew, penetratin the wall of the said casing and engaged wit a screwthreaded hole in the said track and a pair of thrust screws, one on eachside of the said middle screw, engaged with screw threaded holes in thesaid casing, and having ends in abutment with the face of the saidtrack.

' WILLIAM S. THOMSON. Witnesses:

G120. R. Bonn, EDWARD H. CURTIS.

homes of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. 0.

